Two decades of ocean CO2 sink and variability

Two decades of OH variability

Two decades of OH variability as inferred by an inversion of atmospheric transport and chemistry of methyl chloroform P. Bousquet, D. A. Hauglustaine, P. Peylin, C. Carouge, and P. Ciais Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Gif sur Yvette, France Université de Versailles Saint Quentin en Yvelines (UVSQ), Versailles, France Laboratoire de Biogéochimie des milieux cont...

Natural Variability and Anthropogenic Trends in the Ocean Carbon Sink.

Since preindustrial times, the ocean has removed from the atmosphere 41% of the carbon emitted by human industrial activities. Despite significant uncertainties, the balance of evidence indicates that the globally integrated rate of ocean carbon uptake is increasing in response to increasing atmospheric CO2 concentrations. The El Niño-Southern Oscillation in the equatorial Pacific dominates int...

Interannual variability in the North Atlantic Ocean carbon sink.

The North Atlantic is believed to represent the largest ocean sink for atmospheric carbon dioxide in the Northern Hemisphere, yet little is known about its temporal variability. We report an 18-year time series of upper-ocean inorganic carbon observations from the northwestern subtropical North Atlantic near Bermuda that indicates substantial variability in this sink. We deduce that the carbon ...

Supporting Online Material for Saturation of the Southern Ocean CO2 Sink Due to Recent Climate Change

Response to Comments on “Saturation of the Southern Ocean CO2 Sink Due to Recent Climate Change”

We estimated a weakening of the Southern Ocean carbon dioxide (CO2) sink since 1981 relative to the trend expected from the large increase in atmospheric CO2. We agree with Law et al. that network choice increases the uncertainty of trend estimates but argue that their network of five locations is too small to be reliable. A future reversal of Southern Ocean CO2 saturation as suggested by Zickf...